Investment Securities (Notes)

12 Months Ended

Dec. 31, 2019

Investments, Debt and Equity Securities [Abstract]

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]

The amortized cost, gross unrealized holding gains and losses, and fair value of long-term and short-term investments by major security type and class of security were as follows as of December 31, 2019 and 2018 (in thousands):

	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Fair Value
As of December 31, 2019
Long-term investments:
Foreign deposits	$	3,323	$	—	$	—		$	3,323
Municipal bond	1,000		—		—			1,000
	$	4,323	$	—	$	—		$	4,323
Short-term investments:
U.S. Treasury securities	$	6,156	$	—	$	(1	)	$	6,155
Certificates of deposit	440		—		—			440
U.S. government funds	63,136		—		—			63,136
	$	69,732	$	—	$	(1	)	$	69,731
	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Fair Value
As of December 31, 2018
Long-term investments:
Foreign deposits	$	2,573	$	—	$	—		$	2,573
Municipal bond	1,000		—		(19		)	981
	$	3,573	$	—	$	(19	)	$	3,554
Short-term investments:
U.S. Treasury securities	$	6,645	$	—	$	(3	)	$	6,642
Certificates of deposit	437		—		—			437
U.S. government funds	47,477		—		—			47,477
	$	54,559	$	—	$	(3	)	$	54,556

Maturities of debt securities classified as available-for-sale were as follows (in thousands):

	December 31, 2019
	Amortized Cost		Fair Value
Available-for-sale:
Due after one year through five years	$	4,323	$	4,323
	$	4,323	$	4,323

The Company evaluated its securities for other-than-temporary impairment and considers the decline in market value for the securities to be primarily attributable to current economic and market conditions. For debt securities, the Company does not intend to sell, nor is it more likely than not that the Company will be required to sell, the securities prior to maturity or prior to the recovery of the amortized cost basis.